RU2238190C1 - Radio system for remote visualization and indication of vehicle pneumatic tire pressure readings - Google Patents

Abstract

FIELD: automotive industry.

SUBSTANCE: invention relates to road vehicles and it is designed for decreasing probability of accidents caused by incorrect operation of vehicle pneumatic tires as a result of reduced tire pressure or increased temperature in tires on the road. According to invention mobile radio telephone with built-in program is introduced into known remote-tire pressure monitoring system providing both reception and transmission of sound and/or control information, receive and/or transmit information on pressure and/or temperature in each pneumatic tire radio communication channel from radio transmitters installed in each wheel.

EFFECT: provision of remote visualization and indication of emergency situations by presenting data on pressure and/or temperature in vehicle pneumatic tires.

2 cl, 2 dwg

Description

The invention relates to road transport and is intended to reduce the likelihood of accidents caused by improper operation of the pneumatic wheels of vehicles (automobiles) by users due to a decrease in pressure or temperature increase in pneumatic tires when the vehicle is moving.

A known device is a sensor for remote monitoring of pressure in the pneumatic tires of a vehicle, which is installed on each wheel of modern cars manufactured by leading world automobile companies, starting from 2001-2002.

For example, this is a Schrader device, see http://www.schrader-electronics.corn. www.schraderelectronics.co.uk. (1).

This sensor is installed on each wheel in the sensor, which also contains a microcontroller, a radio transmitter and a battery power supply. And to the vehicle’s interface bus, a unit containing a radio receiver, a radio packet filtering unit, and an interface module are connected.

This system works as follows. Pressure sensors after a certain specified period of time, initiated by microcontrollers installed in each sensor, measure the pressure in a particular tire, and the microcontroller of each sensor converts this pressure value into a radio packet, which is sent via the radio transmitter to the air.

Further, this information is transmitted via a radio channel to a radio receiver, and then this information is filtered in a filter block of radio packets and fed to the vehicle interface module, from which information is fed to the vehicle’s display panel, which is displayed in a convenient form for the user (car driver) from all wheels .

This system of remote visualization and signaling of pressure readings in pneumatic tire tires has recently been installed only on modern cars of leading world companies.

And on the vast majority of cars in operation, this system is completely absent and therefore these cars remain potentially dangerous in an emergency. And the re-equipment of their above-described system is associated with high financial costs.

The aim of the invention is to develop and create a relatively inexpensive and at the same time effective device for remote visualization and alarm signaling of emergency readings of pressure or pressure and temperature in the pneumatic tires of the vehicle. Moreover, this device should provide

1. continuous measurement of the pressure in the pneumatic tire of each wheel of the car and transmit pressure readings to any indicator panel in the car or to a mobile radiotelephone;

2. continuous measurement of the temperature inside the pneumatic tire in each wheel and also provide the ability to transmit temperature readings for the user to any display panel or mobile radiotelephone;

3. issuing to the user a timely signal about a dangerous change in pressure or both pressure and temperature in the pneumatic tire of each car wheel.

The specified technical result is achieved as follows. A well-known system for remote monitoring of pressure in the pneumatic tires of a vehicle additionally includes a mobile radiotelephone with an additional program built into it, which, along with the reception and transmission of sound and / or control information and / or data, can be received and / or broadcast on the radiotelephone indicator also provides information on pressure readings or both pressure and temperature in each pneumatic tire of a wheel via a radio channel from radio transmitters installed on each wheel.

This radio system also allows you to issue information on the radio channel at least on the indicator of a mobile radiotelephone. This radio system also allows you to issue and receive on the radio communication channel is very important - alarm information or an alarm signal about a critical change in pressure or pressure and temperature in each pneumatic tire of the vehicle.

As a close analogue of the invention, it is possible to take the well-known system for remote monitoring of pressure in the pneumatic tires of a Schrader vehicle according to the source of scientific and technical information (1).

Figure 1 shows a diagram of the proposed radio system for remote visualization and alarm pressure readings in the pneumatic tires of the vehicle. Figure 2 shows a structural diagram of a pressure sensor or and pressure and temperature installed in each wheel of the vehicle.

The proposed radio system - the device contains the following nodes and blocks.

Mobile radiotelephone 1 is equipped with a standard communication interface 2 (figure 1). Mobile radiotelephone 1 operates and is located in the coverage area of the nearest base station 3. Pressure sensors 4 are installed and each wheel of the car.

The pressure sensor 4 contains directly a pressure sensor or both pressure and temperature 5, which is connected to the microcontroller 6, and a radio transmitter 7 is connected to it, and all of them are connected to the battery power supply 8 (figure 2).

The proposed radio system for remote visualization and signaling the pressure in the pneumatic tires of the vehicle operates as follows.

The microcontroller 6 of each sensor 4 systematically "wakes up" at regular intervals and reads information from the pressure sensor or both pressure and temperature 5 of the pneumatic tire of the wheel. Further this information is encoded; a unique serial code of the car wheel is added to this information. In this case, coding is a standard algorithm for the operation of devices of this kind, that is, a standard communication protocol over a radio channel.

In addition to this information, “floating” bits are added, the algorithm for the appearance of which is known only to the user who bought pressure sensors or pressure and temperature sensors. And this is a code, the value of which the owner of the mobile phone must enter into his radiotelephone.

Since the algorithms are known, only identically generated packets of information with "floating" bits, the equivalence of which was verified by the processor of the mobile radiotelephone 1, must be displayed on the radiotelephone display and / or broadcast to a higher-level system; this is necessary to minimize the likelihood of occurrence of "false" information packets and, accordingly, filtering other people's information packets.

In addition to this information, verification and control codes are entered; Further, from this entire set of information, a radio communication package is compiled by the microcontroller 6, which is transmitted via the radio transmitter 7 at the frequency ism of the band, for example, 915 MHz to the air.

The mobile radiotelephone 1 with an additional program built into it, systematically briefly switches from the frequency receiving range of the base station 3 to receiving information from the ISM range, at which information is transmitted by the radio transmitter 7 of the pressure sensor 4.

If, within a certain period of time, the additional program of the mobile radiotelephone 1 does not detect an ISM carrier signal, the additional program of the mobile radiotelephone 1 switches back to the reception range of the base station 3.

If a carrier signal is detected, the additional program of the mobile radiotelephone 1 receives and decodes a packet of information from pressure sensors or both pressure and temperature 4.

The following options for the functioning of the proposed radio system are possible, depending on what modes the user has set, the system.

Option 1. The user allows the reception of messages with a pressure sensor 4, the serial numbers of which the user entered into the memory of the mobile radiotelephone. 1. This is necessary to filter information packets so that the user of the mobile radiotelephone 1 does not respond to information about the tire pressure of other people's cars.

Option 2. This version of the system is a subsystem for the parent system. Communication between the two systems is via a communication interface that connects to the standard communication interface and the mobile radiotelephone 1. The superior system may be, for example, a computer. This option is necessary, for example, when debugging the proposed radio system, as well as to collect information from the service center about the installed sensors on many cars.

Option 3. The user of the mobile radiotelephone 1 can choose a mode in which in the event of a critical decrease in pressure and / or temperature increase in the tire, the mobile radiotelephone will provide both sound and light information about this state of the system.

Option 4. The user of the mobile radiotelephone 1 can also select a mode in which information about the pressure or pressure and temperature in the tire, changes which occur below a certain threshold, can lead to automatic generation, for example, SMS messages to a given number or sending E- mail messages.

Option 5. The user selects a mode in which the mobile radiotelephone 1 receives only an alarm signal about a critical decrease in pressure or an increase in temperature in the tire. This mode is necessary if a conversation or data reception is being conducted on a mobile radiotelephone at this time. In this case, the conversation or reception of data is automatically interrupted or limited.

After receiving the alarm, the mobile radiotelephone processor selects this packet of information and issues an alarm, this mode is necessary in networks with low bandwidth.

All of the above options for the operation of the proposed radio system are provided for by an additional program built into the mobile radiotelephone 1.

Due to the fact that the car has several wheels, and information is transmitted from all wheels at the same frequency, radio packet collisions are possible and the probability of correctly receiving radio packets will be less than one. Therefore, not all radio packets can be received by the mobile radiotelephone 1.

Due to the “failure” of any radio packet, a situation may arise in which the pressure in the pneumatic tire, for example, has dropped, the radio packet has been transmitted but not received by the mobile radiotelephone 1. In this situation, the microcontroller 6 of the pressure sensor 4 is in accordance with the operating program issues several of the same radio packets in which an alarm code is present.

Due to the fact that the microcontroller 6 issues a large number of repeating radio packets, the probability of their reception will increase and tend to unity. The mobile radiotelephone “picks up” this alarm code and decodes it, as a result of which it gives a light or sound signal to the user to take specific actions in an emergency.

Literature

1. "Sensor device for remote monitoring of pressure in the pneumatic tires of a vehicle" by schrader, CM. http: www.schraderelectronics.com. www.schraderelectronics.co.uk.

Claims (2)

1. A radio system for remote visualization and signaling of pressure readings in the pneumatic tires of a vehicle, comprising sensors mounted on each wheel of the vehicle, equipped with microcontrollers, pressure sensors, radio transmitters with communication interfaces transmitting information on the air, characterized in that it further comprises at least a mobile radiotelephone with an additional program built into it, and this system is implemented with the possibility, along with the reception and transmission of sound and / or control information and / or data to receive and / or broadcast information on pressure or pressure and temperature readings in each pneumatic tire of a wheel via a radio channel from radio transmitters installed on each wheel to the indicator of a mobile radiotelephone. 2. The radio system according to claim 1, characterized in that the radio system is configured to give the user and receive via the radio communication channel alarm information or an alarm signal about a critical change in pressure or pressure and temperature in each pneumatic tire of the vehicle.

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